Bulk bags—also known as FIBCs (Flexible Intermediate Bulk Containers)—are essential in modern logistics, widely used in agriculture, chemicals, construction, and food sectors. With global demand expected to reach $7.4 billion by 2028, understanding how these bags are made reveals why they are trusted worldwide.
Raw Material & Extrusion
Production starts with polypropylene (PP) resin, melted and extruded into tape yarn, then stretched to increase strength.
Weaving
Stretched tapes are woven into plain-weave fabric (typically 120–250 GSM) on circular or flat looms. Quality is controlled for tensile strength, GSM, and uniformity.
Coating (Optional)
Some bags are coated with PE to block moisture or dust—common in food, pharma, or powder applications.
Cutting & Printing
Fabric is cut into panels based on bag design (e.g., U-panel or 4-panel) and may be printed with branding or handling instructions.
Sewing & Assembly
Panels are stitched with lift loops, spouts, and inner liners if needed. Most bags are rated 5:1 or 6:1 for SWL and safety, meeting ISO 21898 standards.
Testing & QC
Each bag is checked for dimensions, weight capacity, UV resistance, and hygiene—especially for export or sensitive use.
Packing & Shipment
Finished bags are baled or palletized for efficient container loading.
Current Trends
Recyclable mono-material designs
Automation in cutting and sewing
RFID/QC codes for tracking
PCR content for sustainability
Conclusion
At HongYi, our bulk bags are engineered for performance, safety, and sustainability. With advanced manufacturing and strict QC, we help global partners move materials more reliably and responsibly.
